Light-projecting device and light cut-off structure thereof

ABSTRACT

A light-projecting device and a light cut-off structure thereof are disclosed. The light cut-off structure includes a cut-off body, a lighting-pattern modifying portion, a first light extinction area and a second light extinction area. The lighting-pattern modifying portion is disposed on the cut-off body. The first light extinction area is disposed on the cut-off body and arranged on a first side of the lighting-pattern modifying portion. The second light extinction area is disposed on the cut-off body and arranged on a second side of the lighting-pattern modifying portion. Therefore, the stray light can be reduced.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The instant disclosure relates to a light-projecting device, and more particularly to a light-projecting device having switchable lighting modes and a light cut-off structure thereof.

2. Description of Related Art

In the design of the conventional vehicle lamp device, demands and regulations for the high-beam light are different from the low-beam light. For example, the high-beam light is demanded for condensing light, such that a long distance illumination can be provided. The low-beam light is demanded for diffusing light, such that a wide view angle can be provided. Therefore, the design concept for the conventional vehicle lamp devices is often to separate the high-beam and low-beam lights. That is to say, the high-beam and low-beam lights respectively include a specific lamp that contributes to the illumination of high-beam or low-beam. The “vehicle lamp structure for illumination” disclosed in Taiwan Patent No. M353845 achieves the function of switching between high beam and low beam by a low-beam module and a high-beam module separated from the low-beam module.

The lighting module of the conventional vehicle lamp device may employ a halogen tungsten lamp and a high intensity discharge lamp (HID lamp). The tungsten halogen lamp has an arc length of 5.6 mm and the HID lamp has an arc length of 4.3 mm. A projector ellipsoid system (PES) is mostly used to match with the lamp source. The HID lamp produces light by means of an electric arc between two electrodes. Accordingly, the light close to the high light intensity region generated by the electric arc can be distributed to enhance the light condensation of the high-beam light. The light away from the high light intensity region generated by the electric arc can be distributed to enhance the light diffusion of the low-beam light. However, a uniform surface light source using light-emitting diodes (LEDs) does not have any high light intensity region. Therefore, it is difficult to design the vehicle lamp device having switchable high-beam and low-beam modes by only one lens. If the vehicle lamp device has the function of switching between high-beam and low-beam in the presence of only one lens, the volume thereof would be increased and the light intensity thereof would only reach the threshold value in compliance with the regulations.

In order to simulate the length and size of the electric arc of the halogen tungsten lamp and the HID lamp, the continuous-chip type LED package in which LED chips are disposed continuously is included in the lighting module. Only one lighting module can be used in the presence of only one optical and only one focal point, so that the LED die (LED chip) having a size of 1 mm×1 mm is used as the unit to be packaged. In the continuous chip type LED package, a plurality of LED dies are bonded to a silicon substrate by eutectic die bonding or other processes, so that the LED dies are spaced from each other at a distance of 0.2 mm, possibly even 0.05 mm. The LED dies can be deemed as a continuous type lighting object due to the small distance therebetween. However, to attain the same brightness condition, the continuous-chip type LED package has a purchase price ten times higher than that of the general LED package. The general LED package can be obtained by directly packaging only one LED dies or directly packaging two, three or more LED dies. That is to say, the general LED package is non-continuous chip type. More specifically, in the non-continuous chip type LED package, the LED chips are spaced from each other at a distance of greater 0.2 or 0.5 mm, possibly even 4 mm.

Often, the lighting structure arranged above the lens optical axis is turned on only when the conventional vehicle lamp device is in the low-beam state. The lighting structure arranged below the lens optical axis is turned on only if the conventional vehicle lamp device is in the high-beam state (the light cut-off plate rotates toward a downward direction). However, the light cannot be efficiently utilized for illumination under such an operation.

Therefore, there is an urgent need to provide a vehicle lamp device that uses the LED light source(s) optically coupled with the light cut-off structure in the presence of only one lens to achieve the function of switching between high-beam and low-beam, so as to solve the above-mentioned problems.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the instant disclosure provides a light-projecting device and a light cut-off structure for reducing the stray light in the light-projecting device.

One of the embodiments of the instant disclosure provides a light cut-off structure which includes a cut-off body, a front cut-off edge, a rear cut-off edge, a top surface, and a light extinction area. The front cut-off edge is arranged on the cut-off body. The rear cut-off edge is arranged on the cut-off body and corresponds in position to the front cut-off edge, wherein the front cut-off edge and the rear cut-off edge constitute a lighting-pattern modifying portion. The top surface is arranged on the cut-off body and connected between the front cut-off edge and the rear cut-off edge. The light extinction area is in the vicinity of the front cut-off edge.

Another one of the embodiments of the instant disclosure provides a light-projecting device which includes a supporting mount, a first reflecting structure, a first light-emitting structure, a lens structure, and a light cut-off structure. The first reflecting structure is disposed on the supporting mount. The first light-emitting structure is disposed on the supporting mount, wherein the first light-emitting structure corresponds in position to the first reflecting structure. The lens structure corresponds in position to the first reflecting structure. The light cut-off structure includes a cut-off body, a front cut-off edge, a rear cut-off edge, a top surface, and a light extinction area. The front cut-off edge is arranged on the cut-off body. The rear cut-off edge is arranged on the cut-off body and corresponds in position to the front cut-off edge, and the front cut-off edge and the rear cut-off edge constitute a lighting-pattern modifying portion. The top surface is arranged on the cut-off body and connected between the front cut-off edge and the rear cut-off edge. The light extinction area is in the vicinity of the front cut-off edge.

Yet another one of the embodiments of the instant disclosure provides a light cut-off structure which includes a cut-off body, a lighting-pattern modifying portion, a first light extinction area, and a second light extinction area.

The lighting-pattern modifying portion is disposed on the cut-off body. The first light extinction area is disposed on the cut-off body and arranged on a first side of the lighting-pattern modifying portion. The second light extinction area is disposed on the cut-off body and arranged on a second side of the lighting-pattern modifying portion.

One benefit of the instant disclosure is that: the light-projecting device and the light cut-off structure thereof according to the embodiments of the instant disclosure can utilize the technical solution about “the light extinction area” to reduce the stray light projected above the horizontal line (i.e., the H-H line shown in the simulation view of the lighting pattern).

To further understand the techniques, means and effects of the instant disclosure, the following detailed descriptions and appended drawings are hereby referred to, such that, and through which, the purposes, features and aspects of the instant disclosure can be thoroughly and concretely appreciated. However, the appended drawings are provided solely for reference and illustration, without any intention to limit the instant disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a further understanding of the instant disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the instant disclosure and, together with the description, serve to explain the principles of the instant disclosure.

FIG. 1 is a three-dimensional assembled schematic view of the light-projecting device according to the first embodiment of the instant disclosure;

FIG. 2 is another three-dimensional assembled schematic view of the light-projecting device according to the first embodiment of the instant disclosure;

FIG. 3 is a three-dimensional exploded schematic view of the light-projecting device according to the first embodiment of the instant disclosure;

FIG. 4 is another three-dimensional exploded schematic view of the light-projecting device according to the first embodiment of the instant disclosure;

FIG. 5 is a three-dimensional cross-sectional schematic view taken along the cut-line V-V of FIG. 1, and showing the low-beam state of the light-projecting device;

FIG. 6 is a side cross-sectional schematic view taken along the cut-line V-V of FIG. 1, and showing the low-beam state of the light-projecting device;

FIG. 7 is a three-dimensional cross-sectional schematic view taken along the cut-line V-V of FIG. 1, and showing the high-beam state of the light-projecting device;

FIG. 8 is a side cross-sectional schematic view taken along the cut-line V-V of FIG. 1, and showing the high-beam state of the light-projecting device;

FIG. 9 is a three-dimensional schematic view of the light cut-off structure according to the second embodiment of the instant disclosure;

FIG. 10 is a side cross-sectional schematic view taken along the cut-line X-X of FIG. 9;

FIG. 11 is a three-dimensional schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 12 is an enlarged view of the section XVI shown in FIG. 11;

FIG. 13 is another three-dimensional schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 14 is still another three-dimensional schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 15 is a front schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 16 is a rear schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 17 is a top schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 18 is a side schematic view of the light-projecting device applied with the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 19 is an enlarged view of the section XIX shown in FIG. 18;

FIG. 20 is another side schematic view of the light-projecting device applied with the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 21 is an enlarged view of the section XXI shown in FIG. 20;

FIG. 22 is another three-dimensional schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 23 is another three-dimensional schematic view of the light cut-off structure according to the third embodiment of the instant disclosure;

FIG. 24 is a three-dimensional schematic view of the light cut-off structure according to the fourth embodiment of the instant disclosure;

FIG. 25 is another three-dimensional schematic view of the light cut-off structure according to the fourth embodiment of the instant disclosure;

FIG. 26 is still another three-dimensional schematic view of the light cut-off structure according to the fourth embodiment of the instant disclosure;

FIG. 27 is still another three-dimensional schematic view of the light cut-off structure according to the fourth embodiment of the instant disclosure;

FIG. 28 is an enlarged view of the section XXVIII shown in FIG. 27;

FIG. 29 is a top schematic view of the light cut-off structure according to the fourth embodiment of the instant disclosure;

FIG. 30 is a three-dimensional schematic view of the light cut-off structure according to the fifth embodiment of the instant disclosure;

FIG. 31 is a three-dimensional schematic view of the light cut-off structure according to the sixth embodiment of the instant disclosure;

FIG. 32 is another three-dimensional schematic view of the light cut-off structure according to the sixth embodiment of the instant disclosure;

FIG. 33 is a three-dimensional assembled schematic view of the light cut-off structure according to the seventh embodiment of the instant disclosure;

FIG. 34 is a top schematic view of the light cut-off structure according to the seventh embodiment of the instant disclosure;

FIG. 35 is a three-dimensional exploded schematic view of the light cut-off structure according to the seventh embodiment of the instant disclosure;

FIG. 36 is a three-dimensional schematic view of the light cut-off structure according to the eighth embodiment of the instant disclosure; and

FIG. 37 is a side schematic view of the light-projecting device applied with the light cut-off structure having the first light extinction area and the second light extinction area according to the ninth embodiment of the instant disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of a light-projecting device and a light cut-off structure thereof according to the instant disclosure are described herein. Other advantages and objectives of the instant disclosure can be easily understood by one skilled in the art from the disclosure. The instant disclosure can be applied in different embodiments. Various modifications and variations can be made to various details in the description for different applications without departing from the scope of the instant disclosure. The drawings of the instant disclosure are provided only for simple illustrations, but are not drawn to scale and do not reflect the actual relative dimensions. The following embodiments are provided to describe in detail the concept of the instant disclosure, and are not intended to limit the scope thereof in any way.

Notably, the terms first, second, third, etc., may be used herein to describe various elements or signals, but these elements or signals should not be affected by such elements or terms. Such terminology is used to distinguish one element from another or a signal with another signal. Further, the term “or” as used herein in the case may include any one or combinations of the associated listed items.

First Embodiment

Please refer to FIGS. 1 to 4 and 6. FIGS. 1 and 2 and FIGS. 3 and 4 are, respectively, three-dimensional assembled and three-dimensional exploded schematic views of the light-projecting device Q. FIG. 6 is a schematic view showing the architecture of the light-projecting device Q in the low-beam state. The light-projecting device Q includes a supporting mount 1, a first reflecting structure 2, a second reflecting structure 3, a first light-emitting structure 4, a second light-emitting structure 5, a lens structure 6, and a light cut-off structure 7. In this embodiment, the first reflecting structure 2 and the second reflecting structure 3 can be formed with a plurality of curved surfaces with different curvatures or only one curved surface. For example, the curved surface(s) is/are ellipse-based curved surface(s). The first reflecting structure 2 and the second reflecting structure 3 are disposed on the supporting mount 1. In this embodiment, the first reflecting structure 2 and the second reflecting structure 3 can be fixed to the supporting mount 1 by at least one fixing member S, such as a fixing screw, but the instant disclosure is not limited thereto. The light-projecting device Q according to the embodiments of the instant disclosure is preferably applied to the vehicle lamp device, so as to switch the vehicle lamp device between the high-beam and low-beam states. Note that, in other embodiments, since the light-projecting device Q does not need to have the second reflecting structure 3 and the second light-emitting structure 5, the light-projecting device Q only provides the low-beam lighting pattern.

Please refer to FIGS. 1 to 4. The first reflecting structure 2 and the second reflecting structure 3 each can have a reflecting surface respectively facing the first light-emitting structure 4 and the second light-emitting structure 5 (i.e., reflecting surfaces 21, 31), so as to reflect emitted lights generated from the first light-emitting structure 4 and the second light-emitting structure 5. The light cut-off structure 7, as shown in FIGS. 5 and 7, can reciprocatingly swing between a first position (i.e., low-beam position) and a second position (i.e., high-beam position), so as to switch the light-projecting device Q between the low-beam state and the high-beam state. In this embodiment, the low-beam lighting pattern is produced when the first light-emitting structure 4 is lighted. The high-beam lighting pattern is produced when the first light-emitting structure 4 and the second light-emitting structure 5 are lighted with the rotation of the light cut-off structure 7. However, there is no limitation to the operation of the low-beam and high-beam states. For example, except for respectively lighting the first light-emitting structure 4 and the second light-emitting structure 5 with the rotation of the light cut-off structure 7 to produce the low-beam lighting pattern or the high-beam lighting pattern, in other embodiments, no matter in the low-beam state or the high-beam state, the first light-emitting structure 4 and the second light-emitting structure 5 can be concurrently lighted with the rotation of the light cut-off structure 7 to provide the low-beam lighting pattern or the high-beam lighting pattern. More specifically, when the first light-emitting structure 4 and the second light-emitting structure 5 are concurrently lighted, the emitted light from the second light-emitting structure 5 can be reflected by the second reflecting structure 3 for the contribution of the hot spot region (i.e., points 75R, 50V and 50R of regulation) of the low-beam lighting pattern. In this embodiment, the first light-emitting structure 4 and the second light-emitting structure 5 each can be a light-emitting diode (LED) or a package structure including a plurality of LEDs. For the light-projecting device Q, the first reflecting structure 2 is configured to diffuse light and the second reflecting structures 3 is configured to condense light, but the instant disclosure is not limited thereto.

Please refer to FIG. 6. The first reflecting structure 2 has at least one first focal point 2 a and at least one second focal point 2 b corresponding in position to the at least one first focal point 2 a. The second reflecting structure 3 has a first focal point 3 a and a second focal point 3 b corresponding in position to the first focal point 3 a. The second focal point 3 b of the second reflecting structure 3 coincides with or is in the vicinity of the second focal point 2 b of the first reflecting structure 2. Preferably, the second focal point 3 b of the second reflecting structure 3 and the second focal point 2 b of the first reflecting structure 2 coincide with each other, but are not limited thereto. In other embodiments, the second focal point 3 b of the second reflecting structure 3 can be in the vicinity of the second focal point 2 b of the first reflecting structure 2.

Please refer to FIGS. 1 to 4 and 5 to 8. FIGS. 5 and 7 are three-dimensional cross-sectional schematic views, respectively, showing the low-beam and high-beam states of the light-projecting device Q. FIG. 8 is a schematic view showing the architecture of the light-projecting device Q in the high-beam state. The supporting mount 1 has a first supporting surface 111 and a second supporting surface 121 that is not coplanar to the first supporting surface 111. The first light-emitting structure 4 is disposed on the first supporting surface 111 to emit a first light L1. The second light-emitting structure 5 is disposed on the second supporting surface 121 to emit a second light L2. In practice, the first light-emitting structure 4 and the second light-emitting structure 5 are respectively disposed on a circuit board (not numbered), and thus are respectively disposed on the supporting mount 1 with the circuit board.

Please refer to FIG. 10. The first light-emitting structure 4 is disposed in exact positional correspondence with the at least one first focal point 2 a of the first reflecting structure 2. The second light-emitting structure 5 is disposed in exact positional correspondence with the first focal point 3 a of the second reflecting structure 3. Note that, under the situation that the first reflecting structure 2 has only one first focal point 2 a, the first light-emitting structure 4 is disposed on the first focal point 2 a, but is not limited thereto. In other embodiments, the first reflecting structure 2 can have two first focal points 2 a (not shown) apart from each other and two second focal points 2 b (not shown) respectively corresponding in position to the first focal points 2 a. In other embodiments, the second reflecting structure 3 can have two first focal points 3 a (not shown) apart from each other and two second focal points 3 b (not shown) respectively corresponding in position to the first focal points 3 a. Note that, under the situation that the first reflecting structure 2 and the second reflecting structure 3 each have at least two first focal points 2 a, 3 a and at least two second focal points 2 b, 3 b, each of them is a reflecting structure having two or more optical axes.

Please refer to FIGS. 1 to 8. Note that, under the situation that the first light-emitting structure 4 and the second light-emitting structure 5 are concurrently lighted, the second light-emitting structure 5 optically coupled with the second reflecting structure 3 not only can, in the low-beam state, contribute to the hot spot region of the low-beam lighting pattern, but also can, in the high-beam state, contribute to the enhancement of the brightness of the high-beam lighting pattern based on the first light-emitting structure 4 optically coupled with the first reflecting structure 2. In this embodiment, the size of the second reflecting structure 3 is smaller than that of the first reflecting structure 2. That is to say, as shown in FIG. 6, the first reflecting structure 2 has a projection area larger than that of the second reflecting structure 3. The projection area of the second reflecting structure 3 can be entirely overlapped within the projection area of the first reflecting structure 2. That is to say, when downwardly viewing along the y-direction (i.e., a downward direction from the first reflecting structure 2 toward the second reflecting structure 3), the second reflecting structure 3 is entirely covered by the first reflecting structure 2. More specifically, as shown in FIG. 5, the surface area of the total reflecting surface of the first reflecting structure 2 is larger than that of the second reflecting structure 3. The surface area of the total reflecting surface of the first reflecting structure 2 is at least two times larger than that of the second reflecting structure 3. Therefore, the overall volume of the light-projecting device Q can be significantly reduced, and the configuration of the supporting mount 1 can be modified so as to enhance the heat-dissipating effect of the light-projecting device Q.

Please refer to FIG. 6. The lens structure 6 has a lens optical axis A and a lens focal point 6 a on the lens optical axis A. The at least one second focal point 2 b of the first reflecting structure 2 and the second focal point 3 b of the second reflecting structure 3 can be positioned on the lens optical axis A or near the lens optical axis A. The instant disclosure takes the practical embodiment in which the at least one second focal point 2 b of the first reflecting structure 2 and the second focal point 3 b of the second reflecting structure 3 are positioned on the lens optical axis A and coincide with the lens focal point 6 a for description, but is not limited thereto. Note that, in this embodiment, the size of the second reflecting structure 3 is smaller than that of the first reflecting structure 2, such that the first focal point 3 a of the second reflecting structure 3, as shown in FIG. 6, can be positioned between the lens focal point 6 a and the at least one first focal point 2 a of the first reflecting structure 2 or right below the at least one first focal point 2 a of the first reflecting structure 2. Furthermore, note that the lens structure 6 has a lens diameter D and the second reflecting structure 3 has a predetermined height R between a top end portion 32 and a bottom end portion thereof, wherein the predetermined height R ranges between D/7 and D/2. Preferably, the top end portion 32 of the second reflecting structure 3 is positioned above the lens optical axis A. For example, the shortest distance between the top end portion 32 of the second reflecting structure 3 and the lens optical axis A is less than 5 mm, preferably between 1 mm and 3 mm.

Please refer to FIGS. 3 to 5 and 7 along with FIG. 6. More specifically, the supporting mount 1 further includes an accommodating slot 13 recessed in the first supporting surface 111. The second reflecting structure 3 and the second light-emitting structure 5 are disposed in the accommodating slot 13, wherein the second supporting surface 121 is a bottom surface of the accommodating slot 13. In the practical embodiment as shown in FIGS. 5 and 8, the first supporting surface 111 is parallel to the lens optical axis A and the second supporting surface 121 is inclined relative to the first supporting surface 111. Accordingly, the second supporting surface 121 is inclined relative to the first supporting surface 111 at a predetermined angle α of between 7 and 90 degrees, preferably between 12.5 and 35 degrees. In other embodiments, the first supporting surface 111 is substantially parallel to the second supporting surface 121. Note that, under the situation that the first supporting surface 111 is parallel to the second supporting surface 121, the first supporting surface 111 and the second supporting surface 121 substantially face a predetermined direction y above a corresponding horizontal plane, but are not limited to the direction perpendicular to the corresponding horizontal plane. For example, in the practical embodiment as shown in FIGS. 5 and 8, the second supporting surface 121 is inclined and faces upwardly. The predetermined direction y that the first supporting surface 111 and the second supporting surface 121 face is a direction above a corresponding horizontal plane.

Therefore, as shown in FIG. 6, a portion of a first projection light L11 generated from the first light-emitting structure 4 and a portion of a second projection light L21 generated from the second light-emitting structure 5 can respectively project to the first reflecting structure 2 and the second reflecting structure 3 toward an upward direction above the corresponding horizontal plane.

Please refer to FIGS. 3 to 5 and 7. The supporting mount 1 can include a first supporting plate 11 and a second supporting plate 12 extending from the first supporting plate 11. The first supporting surface 111 can be disposed on the first supporting plate 11 and the second supporting surface 121 can be disposed on the second supporting plate 12. The second supporting plate 12 (or second supporting surface 121) can be inclined relative to the first supporting plate 11 (or first supporting surface 111). The accommodating slot 13 can be formed between the first supporting plate 11 and the second supporting plate 12, and be surrounded by a connecting plate 14 connected between the first supporting plate 11 and the second supporting plate 12. Note that, the material cost can be reduced by the extension of the second supporting plate 12 from the first supporting plate 11. Furthermore, the configuration of the first supporting plate 11, the connecting plate 14, and the second supporting plate 12 is in a step shape, and the first light-emitting structure 4 and the second light-emitting structure 5 are respectively disposed on the first supporting plate 11 and the second supporting plate 12. Therefore, the first light-emitting structure 4 can be interlaced with the second light-emitting structure 5 to separate heat sources, and to increase the heat-dissipating area so as to enhance the heat-dissipating effect.

Please refer to FIGS. 3 to 5 and 7. The supporting mount 1 further includes a plurality of heat-dissipating structures 15. The heat-dissipating structures 15 such as heat-dissipating fins can be disposed on a first heat-dissipating surface 112 opposite to the first supporting surface 111 or a second heat-dissipating surface 122 opposite to the second supporting surface 121. The heat-dissipating structures 15 can extend along a direction away from the first supporting surface 111 and a direction away from the second heat-dissipating surface 122 (directions below the corresponding horizontal surface). Note that, the second supporting plate 12 is connected to the first supporting plate 11 by the connecting plate 14, such that the extension length of the heat-dissipating structures 15 disposed on the first heat-dissipating surface 112 can be longer than that of the heat-dissipating structures 15 disposed on the second heat-dissipating surface 122 to significantly enhance the heat-dissipating effect. Under this situation, the connecting plate 14 is surrounded by the heat-dissipating structures 15 disposed on the first heat-dissipating surface 112. Note that, in other embodiments, the light-projecting device Q can further include a fan structure (not shown) which can be disposed on the supporting mount 1. More specifically, the supporting mount 1 further includes a fixing portion 16 for fixing the fan structure N. The fixing portion 16 can be disposed on the first heat-dissipating surface 112 or the second heat-dissipating surface 122. Therefore, a better heat dissipating effect can be achieved due to the height and size differences between the first supporting plate 11 and the second supporting plate 12.

Please refer to FIGS. 1 to 4. The light-projecting device Q can further include a lens holding structure 8 which can be disposed on the supporting mount 1. The lens structure 6 can be disposed on the lens holding structure 8. More specifically, the supporting mount 1 further includes a retaining portion 17 disposed on the first supporting plate 11 for retaining the lens holding structure 8. The lens holding structure 8 further includes a holding portion 81 for holding the lens structure 6 and a connecting portion 82 for connecting to the retaining portion 17 of the supporting mount 1.

Please refer to FIGS. 1 to 4. The light cut-off structure 7 of the light-projecting device Q can disposed on the supporting mount 1 and between the first reflecting structure 2 and the second reflecting structure 3 to reciprocatingly swing around a rotation axis I. More specifically, the light cut-off structure 7 can be driven by a driving unit M. In this embodiment, the driving unit M includes an electromagnetic valve M1 and a rod member M2 controlled by the electromagnetic valve M1. The rod member M2 can drive a linking portion (not shown) of the light cut-off structure 7 to rotate the light cut-off structure 7 around the rotation axis I. Note that, there is no limitation to the type of the driving unit M as shown in the figures, other applicable types of the driving unit M are known to the persons skilled in the art. In this embodiment, the light cut-off structure 7 is configured to produce the cut-off line. Accordingly, as shown in FIG. 6, the first light L1 generated from the first light-emitting structure 4 and the second light L2 generated from the second light-emitting structure 5 can be selectively shielded by the light cut-off structure 7 to produce the lighting pattern in compliance with regulations. That is to say, any lighting pattern produced with the cut-off line is the lighting pattern in compliance with regulations of the car headlamp. The details about the light cut-off structure 7 will be further described hereinafter.

Please refer to FIGS. 6 and 8. The following will further describe the light path of the first light L1 and the second light L2. The first reflecting structure 2 has a first focal point 2 a and a second focal point 2 b corresponding in position to the first focal point 2 a. The second reflecting structure 3 has a first focal point 3 a and a second focal point 3 b corresponding in position to the first focal point 3 a. The first light-emitting structure 4 can include a light-emitting element such as an LED chip or a packaged LED array including a plurality of LEDs, preferably an LED chip. The second light-emitting structure 5 can include a light-emitting element 51. The light-emitting element of the first light-emitting structure 4 is disposed on the at least one first focal point 2 a of the first reflecting structure 2. The light-emitting element 51 of the second light-emitting structure 5 is disposed on the at least one first focal point 3 a of the second reflecting structure 3. However, the instant disclosure is not limited to the above-mentioned example. In other embodiments, the first reflecting structure 2 can have a plurality of first focal points 2 a and a plurality of second focal points 2 b respectively corresponding in position to the first focal points 2 a. The second reflecting structure 3 can have a plurality of first focal points 3 a and a plurality of second focal points 3 b respectively corresponding in position to the first focal points 3 a.

In addition, the first light-emitting structure 4 and the second light-emitting structure 5 can have a plurality of light-emitting elements. Note that, Although the edge of the light-emitting element 51, as shown in FIG. 5, can be inclined relative to the edge of the light-emitting element 41 at an inclination angle of 45 degrees, in other embodiments, the light-emitting element 51 can be rotated at an angle to allow its edge to be parallel to the edge of the light-emitting element 41. Note that, as shown in FIG. 7, when a connection line defined by two farthest vertexes of the light-emitting element 51 is parallel to the lens optical axis A, a lighting pattern having a higher brightness or a wider illumination range can be provided.

Please refer to FIG. 6. An optical axis (not shown) of the second reflecting structure 3 can be interlaced with and inclined relative to the lens optical axis A. The first light L1 generated from the first light-emitting structure 4 includes at least one first projection light L11 projecting to the first reflecting structure 2. The first projection light L11 can be reflected by the first reflecting structure 2 to provide at least one first reflection light L12 that passes through the at least one second focal point 2 b of the first reflecting structure 2.

The second light L2 generated from the second light-emitting structure 5 includes at least one second projection light L21 projecting to the second reflecting structure 3. The second projection light L21 can be reflected by the second reflecting structure 3 to provide at least one second reflection light L22 that passes through the second focal point 3 b of the second reflecting structure 3. In this embodiment, the light cut-off structure 7 has a top surface 73, and the second reflection light L22 can travel along the top surface 73 to pass through the second focal point 3 b of the second reflecting structure 3.

Note that, in this embodiment, the projection direction of a portion of a first projection light L11 and the projection direction of a portion of a second projection light L21 are toward a predetermined direction y (i.e., an upward direction). For example, in the practical embodiment as shown in FIGS. 1 to 8, the first supporting surface 111 and the second supporting surface 121 both face the predetermined direction y, and the first light-emitting structure 4 and the second light-emitting structure 5 are respectively disposed along the first supporting surface 111 and the second supporting surface 121. Accordingly, a portion of a first projection light L11 and a portion of a second projection light L21 can respectively project to the first reflecting structure 2 and the second reflecting structure 3 along an upward direction (above the corresponding horizontal plane).

Please refer to FIG. 8. The main difference between FIGS. 6 and 8 is that the light cut-off structure 7 as shown in FIG. 8 is in the low-beam state. More specifically, the light cut-off structure 7 can rotate around the rotation axis I and has a predetermined pivot angle relative to the lens optical axis A. The light cut-off structure 7 can reciprocatingly swing in the predetermined pivot angle θ which can range between 15 and 35 degrees. Therefore, the light-projecting device Q can be switched between the low-beam and high-beam state by the reciprocating rotation of the light-projecting device Q.

Second Embodiment

Please refer to FIGS. 9 and 10. FIGS. 9 and 10 are schematic views of the light cut-off structure 7 according this embodiment. Note that, the light cut-off structure 7 of this embodiment can be used to replace that of the first embodiment. The light cut-off structure 7 of this embodiment is suitable for the application that the second light-emitting structure 5 is positioned below the lens optical axis A, or the application that the second light-emitting structure 5 is positioned below the lens optical axis A and the first light-emitting structure 4 is positioned on or above the lens optical axis A. That is to say, for the light-projecting device Q of this embodiment, a straight-line distance between the first focal point 3 a of the second reflecting structure 3 and the lens optical axis A is longer than that between the first focal point 2 a of the first reflecting structure 2 and the lens optical axis A.

More specifically, the light cut-off structure 7 includes a front cut-off edge 71, a rear cut-off edge 72, and a top surface 73. The front cut-off edge 71 and the rear cut-off edge 72 are disposed in positional correspondence with each other, and the top surface 73 is disposed between the front cut-off edge 71 and the rear cut-off edge 72. When a light travels through the light cut-off structure 7, the light can be selectively shielded by the front cut-off edge 71 to produce the cut-off line in compliance with regulations of the car headlamp can be produced. In this embodiment, the front cut-off edge 71 and the rear cut-off edge 72 are arranged on a cut-off body 70 and disposed in positional correspondence with each other, so as to constitute a lighting-pattern modifying portion on the cut-off body 70. The cut-off line is formed when at least one light is selectively shielded by the lighting-pattern modifying portion. For example, the lighting-pattern modifying portion of an embodiment as shown in FIG. 9 is constituted of front and rear transitional edge segments 715, 725, a transitional reflecting surface 735, and first and second connecting line segments 736, 737. Furthermore, as shown in FIG. 10 an extension direction E toward the rear cut-off edge 72 from the front cut-off edge 71 can be defined as an inclination direction E. When the light cut-off structure 7 is in the low-beam state, a portion of the top surface 73 is inclined along the inclination direction E. The portion of the top surface 73 can have a predetermined inclination angle β relative to a horizontal plane H or the lens optical axis A of the light-projecting device Q. The predetermined inclination angle β can be greater than 0 degrees and less than 30 degrees, preferably between 1 and 25 degrees, more preferably between 15 and 25 degrees. The front cut-off edge 71 can be in an arc shape. Note, that, the horizontal plane H can be parallel to the lens optical axis A, or be parallel to and coincide with the lens optical axis A.

Please refer to FIG. 10. The main difference according an embodiment of the instant disclosure from the prior art is that a portion of the top surface 73 is inclined backwardly along the inclination direction E. That is to say, the portion of the top surface 73 extends toward the second light-emitting structure 5 at an inclination angle. Therefore, under the situation that the light cut-off structure 7 of this embodiment is applied to the light-projecting device Q of the first embodiment, the second reflection light L22 generated from the second light-emitting structure 5 can travel along the portion of the top surface 73 that is inclined relative to the horizontal plane H or the lens optical axis A and project through the second focal point 3 b of the second reflecting structure 3. That is to say, the second reflection light L22 generated from the second light-emitting structure 5 can sequentially travel through the rear cut-off edge 72, the top surface 73, and the front cut-off edge 71.

Please refer to FIG. 13. The light cut-off structure 7 further includes a front side surface 74 and a rear side surface 75 opposite to the front side surface 74. The front side surface 74 is connected to the front cut-off edge 71 and the rear side surface 75 is connected to the rear cut-off edge 72. The top surface 73 is arranged between the front side surface 74 and the rear side surface 75. Furthermore, the front cut-off edge 71 includes a first front edge segment 711, a second front edge segment 712, and a front transitional edge segment 715 connected or arranged between the first front edge segment 711 and the second front edge segment 712. The front transitional edge segment 715 can be inclined relative to the first front edge segment 711 and the second front edge segment 712. The rear cut-off edge 72 includes a first rear edge segment 721, a second rear edge segment 722, and a rear transitional edge segment 725 connected or arranged between the first rear edge segment 721 and the second rear edge segment 722. The top surface 73 includes a first reflecting surface 731, a second reflecting surface 732, a transitional reflecting surface 735 connected or arranged between the first reflecting surface 731 and the second reflecting surface 732, a first connecting line segment 736 arranged between the first reflecting surface 731 and the transitional reflecting surface 735, and a second connecting line segment 737 arranged between the second reflecting surface 732 and the transitional reflecting surface 735. In this embodiment, the first reflecting surface 731 and the second reflecting surface 732, and the transitional reflecting surface 735 are inclined along the predetermined inclination direction E, but are not limited thereto. Preferably, the length of the front transitional edge segment 715 is shorter than the length of the rear transitional edge segment 725, but is not limited thereto. In other embodiments, the front transitional edge segment 715 can have a suitable length to selectively shield the lights of the first light-emitting structure 4 and the second light-emitting structure 5, so as to produce lighting patterns in compliance with regulations.

Please refer to FIG. 9. The first reflecting surface 731, the second reflecting surface 732, and the transitional reflecting surface 735 are arranged between the front cut-off edge 71 and the second cut-off edge 72. More specifically, the first reflecting surface 731 is disposed between the first front edge segment 711 and the first rear edge segment 721. The second reflecting surface 732 is disposed between the second front edge segment 712 and the second rear edge segment 722. The transitional reflecting surface 735 is disposed between the front transitional edge segment 715 and the rear transitional edge segment 725. The first connecting line segment 736 and the second connecting line segment 737 are disposed between the front cut-off edge 71 and the second cut-off edge 72, wherein the first connecting line segment 736 is unparallel to the second connecting line segment 737.

In the prior art, the front side surface 74 and the rear side surface 75 are at the same height level (i.e., the first front edge segment 711 and the first rear edge segment 721 are at the same height level, the second front edge segment 712 and the second rear edge segment 722 are at the same height level, and the front transitional edge segment 715 and the rear transitional edge segment 725 are at the same height level). Under the situation that the conventional light cut-off structure 7 is applied to the practical embodiment in which the second light-emitting structure 5 is disposed below the lens optical axis A, the second reflection light L22 of the second light-emitting structure 5 would be shielded by the rear side surface 75 of the conventional light cut-off structure 7. Compared to the prior art, a portion of the top surface 73 of the light cut-off structure 7 of this embodiment is inclined along the predetermined inclination direction E and has a predetermined inclination angle β relative to the horizontal plane H or the lens optical axis A of the light-projecting device Q. Therefore, the light flux of the second light L2 projecting through the second focal point 3 b of the second reflecting structure 3 can be increased. The predetermined inclination angle β can be greater than 0 degrees and less than 30 degrees, preferably between 1 and 25 degrees, more preferably between 15 and 25 degrees. Note that, the portion of the top surface 73 is inclined along the predetermined inclination direction E, such that the second light L2 can contribute to the hot spot region of the low-beam lighting pattern. The horizontal plane H (x-z plane) is a virtual plane and substantially parallel to the lens optical axis A.

Third Embodiment

Please refer to FIGS. 11 to 14 together with FIGS. 15 and 16. The third embodiment of the instant disclosure provides a light cut-off structure 7 which can be applied to the light-projecting device Q. The main difference between this embodiment as shown in FIG. 11 and the second embodiment as shown in FIG. 9 is that the light cut-off structure 7 of this embodiment is formed with a recess structure G. In addition, the first reflecting surface 731 and the second reflecting surface 732 of the light cut-off structure 7 of this embodiment are substantially parallel to the lens optical axis A. More specifically, the light cut-off structure 7 includes a front cut-off edge 71, a rear cut-off edge 72, and a top surface 73. The rear cut-off edge 72 and the front cut-off edge 71 are disposed in positional correspondence with each other, and the top surface 73 is disposed between the front cut-off edge 71 and the rear cut-off edge 72. The extension direction toward the rear cut-off edge 72 from the front cut-off edge 71 is defined as an inclination direction E. A portion of the top surface 73 can have a predetermined inclination angle β relative to the horizontal plane H or the lens optical axis A of the light-projecting device Q. The predetermined inclination angle β can be greater than 0 degrees and less than 30 degrees, preferably between 1 and 25 degrees, more preferably between 15 and 25 degrees. Therefore, a lighting pattern with a cut-off line in compliance with regulations of the car headlamp can be produced when at least one light is selectively shielded by the front cut-off edge 71 and the rear cut-off edge 72.

Please refer to FIGS. 11 to 14. The light cut-off structure 7 further includes a front side surface 74 and a rear side surface 75 opposite to the front side surface 74. The front side surface 74 is connected to the front cut-off edge 71 and the rear side surface 75 is connected to the rear cut-off edge 72. The top surface 73 is arranged between the front side surface 74 and the rear side surface 75. Furthermore, the front cut-off edge 71 includes a first front edge segment 711, a second front edge segment 712, and a front transitional edge segment 715 connected or arranged between the first front edge segment 711 and the second front edge segment 712. The front transitional edge segment 715 is inclined relative to the first front edge segment 711 and the second front edge segment 712. The rear cut-off edge 72 includes a first rear edge segment 721, a second rear edge segment 722, and a rear transitional edge segment 725 connected or arranged between the first rear edge segment 721 and the second rear edge segment 722. In this embodiment, the front cut-off edge 71 of the light cut-off structure 7 further includes a third front edge segment 713 connected to the first front edge segment 711 and a fourth front edge segment 714 connected to the second front edge segment 712. The rear cut-off edge 72 further includes a third rear edge segment 723 connected to the first rear edge segment 721 and a fourth rear edge segment 724 connected to the second rear edge segment 722. Note that, in other embodiments, the first front edge segment 711 and the third front edge segment 713 can be the integrated into one segment. The second front edge segment 712 and the fourth front edge segment 714 can be the integrated into one segment. The first front edge segment 711 is disposed between the third front edge segment 713 and the front transitional edge segment 715. The first rear edge segment 721 is disposed between the third rear edge segment 723 and the rear transitional edge segment 725.

Please refer to FIGS. 11 to 14. The top surface 73 includes a first reflecting surface 731, a second reflecting surface 732, and a transitional reflecting surface 735 connected or arranged between the first reflecting surface 731 and the second reflecting surface 732. Compared to the second embodiment, the light cut-off structure 7 of this embodiment further includes a third reflecting surface 733 and a fourth reflecting surface 734. Furthermore, the top surface 73 further includes a first connecting line segment 736 and a second connecting line segment 737 which are disposed between the front cut-off edge 71 and the rear cut-off edge 72. The transitional reflecting surface 735 is disposed between the first connecting line segment 736 and the second connecting line segment 737. Preferably, the first connecting line segment 736 is unparallel to the second connecting line segment 737, but is not limited thereto. The first connecting line segment 736 is disposed between the third reflecting surface 733 and the transitional reflecting surface 735. The second connecting line segment 737 is disposed between the fourth reflecting surface 734 and the transitional reflecting surface 735.

More specifically, the first reflecting surface 731 is disposed between the third front edge segment 713 and the third rear edge segment 723. The second reflecting surface 732 is disposed between the fourth front edge segment 714 and the fourth rear edge segment 724. The transitional reflecting surface 735 is disposed between the front transitional edge segment 715 and the rear transitional edge segment 725. The third reflecting surface 733 is disposed between the first reflecting surface 731 and the transitional reflecting surface 735. The fourth reflecting surface 734 is disposed between the second reflecting surface 732 and the transitional reflecting surface 735. In other words, the first reflecting surface 731 is disposed between the third front edge segment 713, the third rear edge segment 723, and the third reflecting surface 733. The second reflecting surface 732 is disposed between the fourth front edge segment 714, the fourth rear edge segment 724, and the fourth reflecting surface 734. The transitional reflecting surface 735 can be disposed between the front transitional edge segment 715 and the rear transitional edge segment 725. Note that, the first reflecting surface 731 is not coplanar to the third reflecting surface 733, and the second reflecting surface 732 is not coplanar to the fourth reflecting surface 734. Preferably, in the third embodiment, the first reflecting surface 731 and the second reflecting surface 732 can be substantially parallel to the horizontal plane H or the lens optical axis A, or parallel to the lens optical axis A of the light-projecting device Q. Note that, in the third embodiment, the first reflecting surface 731 and the second reflecting surface 732 can be parallel to the horizontal plane H or the lens optical axis A of the light-projecting device Q, such that the brightness of the light-diffusing area (i.e., points 25L2, 25R1, 25L3, 25R2, 15L, and 15R regulated by ECE R98 and points 25L and 25R regulated by ECE R112) can be increased.

Furthermore, the light cut-off structure 7 has a recess structure G constituted of the third reflecting surface 733, the fourth reflecting surface 734, and the transitional reflecting surface 735 of the top surface 73. In other words, the recess structure 78 is recessed in the top surface 73 and disposed between the front cut-off edge 71 and the rear cut-off edge 72. The transitional reflecting surface 735 of the recess structure 78 recessed in the top surface 73 is inclined along the inclination direction E. Therefore, at least one light generated from the second light-emitting structure 5 can sequentially travel through the rear cut-off edge 72, the transitional reflecting surface 735, and the front cut-off edge 71, and a cut-off line can be produced when the emitted light is selectively shielded by the front cut-off edge 71.

Please refer to FIGS. 11 to 14. The light cut-off structure 7 further includes a residual-light reflecting plate 7R1 disposed on the front side surface 74. The residual-light reflecting plate 7R1 has a residual-light reflecting surface 7R1S. The residual-light reflecting plate 7R1 is configured to further provide the illumination of the dark zone (i.e., Zone III in compliance with regulations). More specifically, when the light cut-off structure 7 is in the low-beam state, the residual-light reflecting surface 7R1S can be inclined at an angle of between 10 and 50 degrees relative to the horizontal plane H, but is not limited thereto. The inclination angle of the residual-light reflecting surface 7R1S can be adjusted according to a reflecting plate 22 of the first reflecting structure 2 of the first embodiment as shown in FIGS. 6 and 18.

Please refer to FIGS. 11 and 15 to 17. The light cut-off structure 7 can further include a lighting-pattern modifying plate 7R2 which can be disposed on the front side surface 74 and has a lighting-pattern modifying surface 7R2S. In this embodiment, the light cut-off structure 7 further includes two lighting-pattern modifying plates 7R2. The two lighting-pattern modifying plates 7R2 are both disposed on the front side surface 74, and respectively positioned on two opposite sides of the residual-light reflecting plate 7R1. In the presence of the lighting-pattern modifying plate 7R2, the illumination range in the low-beam state can be modified. Note that, the light cut-off structure 7 having the lighting-pattern modifying plate 7R2 is preferably applied to the first or the second light-emitting structure 4, 5 with non-continuous chips in which a predetermined distance between two adjacent chips is provided. However, as shown in FIGS. 22 and 23, the light cut-off structure 7 can be designed to have one, both, or none of the residual-light reflecting plate 7R1 and the lighting-pattern modifying plates 7R2, and also can use the recess structure G to enhance the luminous efficiency.

Please refer to FIGS. 18 to 21. FIG. 18 is a schematic view showing the low-beam of the light cut-off structure 7. FIG. 20 is a schematic view showing the high-beam of the light cut-off structure 7. The following will describe in details the light path of the light projected to the light cut-off structure 7. Preferably, in this embodiment, no matter the light cut-off structure 7 is in the low-beam state or the high-beam state, the first light-emitting structure 4 and the second light-emitting structure 5 can be concurrently lighted to respectively generate a first light L1 and a second light L2. More specifically, as shown in FIGS. 18 and 19, the first reflecting structure 2 of the light-projecting device Q can further include a reflecting plate 22. The first light L1 generated from the first light-emitting structure 4 can include a first projection light L11 projecting to the first reflecting structure 2. A portion of the first projection light L111 can project to a first reflecting surface 21 of the first reflecting structure 2. Another portion of the first projection light L112 can project to the reflecting plate 22 of the first reflecting structure 2. After that, the portion of the first projection light L111 is reflected by the first reflecting surface 21 of the first reflecting structure 2 to provide a first reflection light L121 passing through the second focal point 2 b of the first reflecting structure 2. The another portion of the first projection light L112 is reflected by the reflecting plate 22 of the first reflecting structure 2 to provide another first reflection light L122 projecting to the residual-light reflecting surface 7R1 of the residual-light reflecting plate 7R1S of the light cut-off structure 7. After that, the another first reflection light L122 is reflected by the residual-light reflecting plate 7R1 of the light cut-off structure 7 to provide a first incidence light L13 projecting to the lens structure 6. Therefore, in the presence of the residual-light reflecting plate 7R1 and the reflecting plate 22, the first incidence light L13 can be projected toward a direction above the corresponding horizontal plane. Accordingly, the first incidence light L13 can provide the illumination of the dark zone (i.e., Zone III in compliance with regulations). In addition, the first light L11 can further include still another first projection light (not shown). The still another first projection light can project to the first reflecting surface 21 of the first reflecting structure 2. After that, the still another first projection light can be reflected by the first reflecting surface 21 to provide still another first reflection light (not shown) projecting to the first reflecting surface 731 and the second reflecting surface 732 of the light cut-off structure 7. After that, the still another first reflection light can be reflected by the first reflecting surface 731 and the second reflecting surface 732 and then project to left and right side regions of the hot spot region (i.e., points 25R and 25L regulated by ECE R112 or points 25L2, 25R1, 25L3, 25R2, 15L, and 15R regulated by ECE R98), so as to enhance the light diffusing effect.

Please refer to FIG. 19. The second light L2 generated from the second light-emitting structure 5 includes a second projection light L21 projecting to the second reflecting structure 3. After that, the second projection light L21 is reflected by the second reflecting structure 3 to provide a second reflection light L22 passing through the second focal 3 b of the second reflecting structure 3. In this embodiment, the second reflection light L22 can travel along the recess structure 78 of the light cut-off structure 7 to pass through the second focal point 3 b of the second reflecting structure 3. Note that, when the light cut-off structure 7 is in the high-beam state, the lighting pattern modifying plates 77 can be used to modify the high-beam lighting pattern so as to obtain desired sharp patterns.

Fourth Embodiment

Please refer to FIG. 24. The fourth embodiment of the instant disclosure provides a light cut-off structure 7 which can be applied to the light-projecting device Q. The main difference between this embodiment as shown in FIG. 24 and the third embodiment as shown in FIG. 23 is that the light cut-off structure 7 of this embodiment further includes a light extinction area that is in the vicinity of the front cut-off edge 71. In this embodiment, the light extinction area includes a first light extinction area 76 and a second light extinction area 77. Accordingly, the stray light projected above the horizontal line (H-H line) can be reduced in the presence of the first light extinction area 76 and the second light extinction area 77. The features of the light cut-off structure 7 of this embodiment except for the light extinction area are the same as those of the above-mentioned embodiments, and the detailed descriptions thereof are omitted here.

Please refer to FIG. 24. The light cut-off structure 7 includes a cut-off body 70, a lighting-pattern modifying portion, a first light extinction area 76, and a second light extinction area 77. The lighting-pattern modifying portion is disposed on the cut-off body 70. The first light extinction area 76 is disposed on the cut-off body 70 and arranged on a first side of the lighting-pattern modifying portion. The second light extinction area 77 is disposed on the cut-off body 70 and arranged on a second side of the lighting-pattern modifying portion.

Please refer to FIG. 24 together with the description about the front cut-off edge 71, the rear cut-off edge 72, the top surface 73, the front side surface 74, and the rear side surface 75. More specifically, the light cut-off structure 7 includes a cut-off body 70, a front cut-off edge 71, a rear cut-off edge 72, a top surface 73, a first light extinction area 76, and a second light extinction area 77. The front cut-off edge 71 and the rear cut-off edge 72 are arranged on the cut-off body 70 and correspond in position to each other so as to constitute the lighting-pattern modifying portion. Accordingly, a cut-off line can be produced when at least one light is selectively shielded by the lighting-pattern modifying portion. The top surface 73 is arranged on the cut-off body 70 and connected between the front cut-off edge 71 and the rear cut-off edge 72.

Please refer to FIG. 24. The front cut-off edge 71, described as above, includes a first front edge segment 711, a second front edge segment 712, and a front transitional edge segment 715 connected or arranged between the first front edge segment 711 and the second front edge segment 712. The front transitional edge segment 715 can be inclined relative to the first front edge segment 711 and the second front edge segment 712. Furthermore, the front cut-off edge 71 of the light cut-off structure 7 further includes a third front edge segment 713 connected to the first front edge segment 711 and a fourth front edge segment 714 connected to the second front edge segment 712. The first front edge segment 711 is connected or arranged between the third front edge segment 713 and the front transitional edge segment 715. The second front edge segment 712 is connected or arranged between the fourth front edge segment 714 and the front transitional edge segment 715. Note that, in some embodiments, the first front edge segment 711 and the third front edge segment 713 can be integrated into one segment or two segments having different slopes. The second front edge segment 712 and the fourth front edge segment 714 can be integrated into one segment or two segments having different slopes.

Please refer to FIG. 26. The rear cut-off edge 72, described as above, includes a first rear edge segment 721, a second rear edge segment 722, and a rear transitional edge segment 725 connected or arranged between the first rear edge segment 721 and the second rear edge segment 722. Furthermore, the rear cut-off edge 72 of the light cut-off structure 7 further includes a third rear edge segment 723 connected to the first rear edge segment 721 and a fourth rear edge segment 724 connected to the second rear edge segment 722. The first rear edge segment 721 is connected or arranged between the third rear edge segment 723 and the rear transitional edge segment 725. The second rear edge segment 722 is connected or arranged between the fourth rear edge segment 724 and the rear transitional edge segment 725.

The top surface 73 is connected between the front cut-off edge 71 and the rear cut-off edge 72, and a portion of the top surface 73 is inclined backwardly along the inclination direction. The top surface 73 includes a first reflecting surface 731, a second reflecting surface 732, a transitional reflecting surface 735 connected or arranged between the first reflecting surface 731 and the second reflecting surface 732. The top surface 73 can further include a third reflecting surface 733 and a fourth reflecting surface 734. The top surface 73 can further include a first connecting line segment 736 and a second connecting line segment 737. The first connecting line segment 736 and the second connecting line segment 737 can be disposed between the front cut-off edge 71 and the rear cut-off edge 72. The transitional reflecting surface 735 can be disposed between the first connecting line segment 736 and the second connecting line segment 737. The first connecting line segment 736 can be parallel or unparallel to the second connecting line segment 737, but is not limited thereto. The first connecting line segment 736 can also be disposed between the third reflecting surface 733 and the transitional reflecting surface 735. The second connecting line segment 737 can also be disposed between the fourth reflecting surface 734 and the transitional reflecting surface 735.

Please refer to FIG. 24. The first light extinction area 76 can be disposed on the top surface 73 of the cut-off body 70. The first light extinction area 76 can be arranged on a first side (e.g., a right side as shown in FIG. 29) of the lighting-pattern modifying portion (the lighting-pattern modifying portion of an embodiment as shown in FIG. 24 is a recess structure G). The second light extinction area 77 can be disposed on the top surface 73 of the cut-off body 70. The second light extinction area 77 can be arranged on a second side (e.g., a left side as shown in FIG. 29) of the lighting-pattern modifying portion (the lighting-pattern modifying portion of an embodiment as shown in FIG. 24 is a recess structure G). However, there is no limitation to the configuration of the lighting-pattern modifying portion. The following will describe the other practical embodiment (e.g., an embodiment as shown in FIG. 31) of the lighting-pattern modifying portion.

Please refer to FIGS. 24 to 26 together with FIGS. 27 and 28. The following will describe the practical embodiment in which the first light extinction area 76 has a first recess 761 and the second light extinction area 77 has a second recess 771. The first recess 761 and the second recess 771, as shown in FIG. 24 are in the vicinity of the front cut-off edge 71. In other words, the first recess 761 and the second recess 771 can be disposed between the front cut-off edge 71 and the rear cut-off edge 72. More specifically, the first recess 761 can extend along the third front edge segment 713 and the second recess 771 can extend along the fourth front edge segment 714. Although the first recess 761, the second recess 771, and the recess structure G are disposed discontinuously or in spaced apart relation, in other embodiments, the first recess 761, the second recess 771, and the recess structure G can be the integrated into one recess, but the instant disclosure is not limited thereto. That is to say, when the first recess 761 and the second recess 771 are connected to each other, there is still a section of the lighting-pattern modifying portion (a section of the recess structure G) formed on the light cut-off structure 7 to produce the lighting pattern in compliance with the regulations. Please refer to FIGS. 24 to 28. The light cut-off structure 7, described as above, further includes a front side surface 74. The front cut-off edge 71 can be connected to the front side surface 74. In addition, the first recess 761 has a first side surface 7611 and a second side surface 7612 connected to the first side surface 7611. The second recess 771 has a third side surface 7711 and a fourth side surface 7712 connected to the third side surface 7711. Furthermore, the front side surface 74, the first side surface 7611, the second side surface 7612, and the top surface 73 are sequentially connected to each other. The front side surface 74, the third side surface 7711, the fourth side surface 7712, and the top surface 73 are sequentially connected to each other.

Please refer to FIGS. 24, 25, and 28. FIG. 28 is a partially enlarged cross sectional view of FIG. 25. In the comparison of FIGS. 24 and 25, the main difference of the embodiment as shown in FIG. 25 from the embodiment as shown in FIG. 24 is that a chamfer T as shown in FIG. 28 is respectively formed between the front side surface 74 and the first side surface 7611, between the first side surface 7611 and the second side surface 7612, between the second side surface 7612 and the top surface 73, between the front side surface 74 and the third side surface 7711, between the third side surface 7711 and the fourth side surface 7712, and between the fourth side surface 7712 and the top surface 73. Note that, in this embodiment, in the presence of the chamfer(s), the stray light can be reduced due to the light scattering and/or light diffusing effect caused by the chamfer(s). Please refer to FIG. 28. FIG. 28 is an enlarged view of the section XXVIII shown in FIG. 27. The features of the first recess 761 and the second recess 771 are concurrently shown in FIG. 28 for convenient description. The first side surface 7611 has a first predetermined angle γ1 of between 5 and 85 degrees relative to the front side surface 74. The third side surface 7711 has a second predetermined angle γ2 of between 5 and 85 degrees relative to the front side surface 74. Preferably, the first predetermined angle γ1 and the second predetermined angle γ2 range between 35 and 55 degrees. More preferably, the first predetermined angle γ1 and the second predetermined angle γ2 are 45 degrees, but are not limited thereto. In addition, the second side surface 7612 has a third predetermined angle γ3 of between 0 and 75 degrees relative to the front side surface 74. The fourth side surface 7712 has a fourth predetermined angle γ4 of between 0 and 75 degrees relative to the front side surface 74. In other words, the second side surface 7612 (or the fourth side surface 7712) can be parallel to or inclined relative to the front side surface 74. To facilitate demolding of the first recess 761 (or the second recess 771), the second side surface 7612 can have a draft angle of greater than or equal to 0 degree. Preferably, the draft angle ranges between 0 and 75 degrees, but the instant disclosure is not limited thereto. Preferably, the third predetermined angle γ3 and the fourth predetermined angle γ4 range between 1 and 30 degrees. More preferably, the third predetermined angle γ3 and the fourth predetermined angle γ4 are 50 degrees, but are not limited thereto. In addition, the second side surface 7612 has a fifth predetermined angle γ5 of between 90 and 165 degrees relative to the top surface 73 (or first reflecting surface 731). The fourth side surface 7712 has a sixth predetermined angle γ6 of between 90 and 165 degrees relative to the top surface 73 (or second reflecting surface 732). Preferably, the fifth predetermined angle γ5 and the sixth predetermined angle γ6 are slightly greater than 90 degrees. More preferably, the third predetermined angle γ3 and the fourth predetermined angle γ4 are 95 degrees, but are not limited thereto.

Please refer to FIG. 29 along with FIG. 25. The top surface 73 has a predetermined width W. The first light extinction area 76 has a first predetermined width W1 and the second light extinction area 77 has a second predetermined width W2. The ratio of the predetermined width W to the first predetermined width W1 is in a range of 50 to 1.1, and the ratio of the predetermined width W to the second predetermined width W2 is in a range of 50 to 1.1, but the instant disclosure is not limited thereto.

Fifth Embodiment

Please refer to FIG. 30. FIG. 30 is a three-dimensional schematic view of the light cut-off structure according to the fifth embodiment of the instant disclosure. In the comparison of FIGS. 30 and 24, the main difference of the fifth embodiment from the fourth embodiment is that the configuration of the first light extinction area 76 and the second light extinction area 77 of the fifth embodiment is different from that of the fourth embodiment. The features of the light cut-off structure 7 of this embodiment except for the light extinction area are the same as those of the above-mentioned embodiments, and the detailed descriptions thereof are omitted here.

Please refer to FIG. 30. More specifically, the first light extinction area 76 has a first layered structure 762 and the second light extinction area 77 has a second layered structure 772. In this embodiment, the first layered structure 762 and the second layered structure 772 each can be a layered structure with the function of light extinction or light absorption (e.g., a black coating layer). In other embodiment, the first layered structure 762 and the second layered structure 772 can be a micro-structure layer (e.g., a rough surface) with the function of light scattering, but the instant disclosure is not limited thereto. When the first layered structure 762 and the second layered structure 772 each are a coating, the first layered structure 762 and the second layered structure 772 each can have a light absorbance of greater than 30%, but the instant disclosure is not limited thereto. In other embodiments, the first layered structure 762 and the second layered structure 772 each can be a film structure with the function of light extinction or light absorption. In other embodiments, the first reflecting surface 731 and the second reflecting surface 732 of the top surface 73 each can have a layered structure (not shown), but the instant disclosure is not limited thereto.

In the fifth embodiment, the top surface 73 has a predetermined width W. The first light extinction area 76 has a first predetermined width W1 and the second light extinction area 77 has a second predetermined width W2. The ratio of the predetermined width W to the first predetermined width W1 is in a range of 50 to 1.1, and the ratio of the predetermined width W to the second predetermined width W2 is in a range of 50 to 1.1, but the instant disclosure is not limited thereto.

Note that, although the practical embodiment as shown in the figures discloses that the first layered structure 762 and the second layered structure 772, and the recess structure G are disposed discontinuously or in spaced apart relation, in other embodiments, the first layered structure 762, the second layered structure 772, and the recess structure G can be connected to each other, but the instant disclosure is not limited thereto. That is to say, when the first layered structure 762 and the second layered structure 772 are connected to each other (integrated into a continuous layered structure), there is still a section of the lighting-pattern modifying portion (a portion of the recess structure G) formed on the light cut-off structure 7 to produce the lighting pattern in compliance with the regulations.

Sixth Embodiment

Please refer to FIG. 31. FIG. 31 is a three-dimensional schematic view of the light cut-off structure according to the sixth embodiment of the instant disclosure. In the comparison of FIGS. 31 and 24, the main difference of the sixth embodiment from the fourth embodiment is that the lighting-pattern modifying portion of the light cut-off structure 7 of the sixth embodiment is different from that of the fourth embodiment. The features of the light cut-off structure 7 of this embodiment except for the lighting-pattern modifying portion are the same as those of the above-mentioned embodiments, and the detailed descriptions thereof are omitted here.

Please refer to FIG. 31. More specifically, the first light extinction area 76 of the light cut-off structure 7 is disposed on the top surface 73 of the cut-off body 70 and arranged on a first side of the lighting-pattern modifying portion. The second light extinction area 76 of the light cut-off structure 7 is disposed on the top surface 73 of the cut-off body 70 and arranged on a second side of the lighting-pattern modifying portion. Compared to the fifth embodiment, the lighting-pattern modifying portion, as shown in FIG. 31, is constituted of a front transitional edge segment 715, a rear transitional edge segment 725, a transitional reflecting surface 735, a first connecting line segment 736, and a second connecting line segment 737. That is to say, the light cut-off structure 7 of this embodiment does not need to have the recess structure G. The first light extinction area 76 and the second light extinction area 77 can be disposed on the conventional light cut-off plate. Note that, although the first light extinction area 76 and the second light extinction area 77, as shown in FIG. 31, respectively utilize the first recess 761 and the second recess 771 to achieve the desired effect, the instant disclosure is not limited thereto. In other embodiments, the first light extinction area 76 and the second light extinction area 77 can respectively utilize the first layered structure 762 and the second layered structure 772 to achieve the desired effect.

Note that, although the practical embodiment as shown in FIG. 31 discloses that the first recess 761 and the second recess 771 are disposed discontinuously or in spaced apart relation, in other embodiments, the first recess 761 and the second recess 771 can be the integrated into one recess as shown in FIG. 32, but the instant disclosure is not limited thereto.

Please refer to FIG. 32. FIG. 32 is another three-dimensional schematic view of the light cut-off structure according to the sixth embodiment of the instant disclosure. In the comparison of FIGS. 31 and 32, the practical embodiment as shown in FIG. 32 discloses that the first recess 761 and the second recess 771 are disposed continuously to form a light extinction area. When the first layered structure 762 and the second layered structure 772 are connected to each other, there is still a section of the lighting-pattern modifying portion formed on the light cut-off structure 7 to produce the lighting pattern in compliance with the regulations. However, the person skilled in the art can utilize the first recess 761, the second recess 771, the first layered structure 762, the second layered structure 772, or any other structure having the same function for light extinction. In the practical embodiment as shown in FIGS. 25 and 30, the first light extinction area 76 and the second light extinction area 77, as shown in FIG. 32, can be connected to each other. When the first light extinction area 76 and the second light extinction area 77 are connected to each other, there is still a recess structure G inclined along the inclination direction E on the light cut-off structure 7.

Seventh Embodiment

Please refer to FIGS. 33 to 35. FIGS. 33 to 35 are schematic views of the light cut-off structure 7 according to the seventh embodiment of the instant disclosure. In the comparison of FIGS. 33 and 24, the main difference of the seventh embodiment from the fourth embodiment is that the first light extinction area 76 and the second light extinction area 77 of the light cut-off structure 7 can be formed by a plate structure 78. The features of the light cut-off structure 7 of this embodiment except for the light extinction area are the same as those of the above-mentioned embodiments, and the detailed descriptions thereof are omitted here.

In this embodiment, the light cut-off structure 7 further includes a plate structure 78. The plate structure 78 includes a first extension portion 781 extending along a first predetermined direction, a second extension portion 782 extending along a second predetermined direction, and a main body portion 783 disposed between the first extension portion 781 and the second extension portion 782. For example, the first predetermined direction can be a direction extending toward a first side of the lighting-pattern modifying portion along the extension direction the front cut-off edge 71 of the light cut-off structure 7. The second predetermined direction can be a direction extending toward a second side of the lighting-pattern modifying portion along the extension direction the front cut-off edge 71 of the light cut-off structure 7. The main body portion 783 can be disposed on the cut-off body 70. Accordingly, the plate structure 78 can be disposed on the cut-off body 70. In addition, the first light extinction area 76 is arranged between the first extension portion 781 and the front cut-off edge 71 and the second light extinction area 77 is arranged between the second extension portion 782 and the front cut-off edge 71.

The first light extinction area 76 and the second light extinction area 77 which are disposed between the plate structure 78 and the front cut-off edge 71 of the light cut-off structure 7 have the same function as the first recess 761 and the second recess 771 which are mentioned in the fourth embodiment. Preferably, the main body portion 783 of the plate structure 78 can have a contour (not shown) that is flush with the front cut-off edge 71, but the instant disclosure is not limited thereto.

Eighth Embodiment

Please refer to FIG. 36. FIG. 36 is a three-dimensional schematic view of the light cut-off structure according to the eighth embodiment of the instant disclosure. In the comparison of FIGS. 36 and 30, the main difference of the eighth embodiment from the fifth embodiment is that the first light extinction area 76 and the second light extinction area 77 of the eighth embodiment can entirely cover the first reflecting surface 731 and the second reflecting surface 732 of the top surface 73. The features of the light cut-off structure 7 of this embodiment except for the light extinction area are the same as those of the above-mentioned embodiments, and the detailed descriptions thereof are omitted here.

More specifically, the first light extinction area 76 can have a first layered structure 762 and the second light extinction area 77 can have a second layered structure 772. The first layered structure 762 and the second layered structure 772 can entirely cover the first reflecting surface 731 and the second reflecting surface 732 of the top surface 73. In addition, the first layered structure 762 and the second layered structure 772 each can have a light absorbance of greater than 30%, but the instant disclosure is not limited thereto.

Ninth Embodiment

Please refer to FIG. 37 along with FIG. 1. FIG. 37 is a side schematic view showing the light-projecting device Q applied with the light cut-off structure 7 having the first light extinction area 76 and the second light extinction area 77. FIG. 37 is also a side schematic view along a cut line XXXVII-XXXVII of FIG. 1.

Note that, the features of the light cut-off structure 7 of the ninth embodiment are the same as those of the above-mentioned embodiments, and the detailed descriptions thereof are omitted here. Although the light-projecting device Q as shown in FIG. 37 is applied with the light cut-off structure 7 of the fourth embodiment, the instant disclosure is not limited thereto. According to practical requirements, the light cut-off structure 7 of the other embodiments can also be applied to the light-projecting device Q.

Please refer to FIG. 37 along with FIGS. 18 and 20. Note that, FIG. 37 only shows the effect caused by the first light extinction area 76 and the second light extinction area 77. More specifically, the first light-emitting structure 4 and the second light-emitting structure 5 can respectively generate a first light L1 and a second light L2. The light path of the second light L2 can refer to the above-mentioned embodiments. In the practical embodiment as shown in FIG. 37, the first light L1 generated from the first light-emitting structure 4 can further include a first projection light L113 projecting to the first reflecting structure 2. The first projection light L113 can be reflected by the reflecting surface 21 of the first reflecting structure 2 to provide a first reflection light L123 projecting to the light extinction area (i.e., the first light extinction area 76 and the second light extinction area 77). Since the first reflection light L123 projects to the first light extinction area 76 or the second light extinction area 77, a resulted first diffusing light L14 does not projects to the lens structure 6. Therefore, the stray light projected above the horizontal line (H-H line shown in the simulation view of the lighting pattern) can be reduced.

One benefit of the instant disclosure is that: the light-projecting device Q and the light cut-off structure 7 thereof according to the embodiments of the instant disclosure can utilize the technical solution about “the light extinction area” to reduce the stray light projected above the horizontal line (i.e., the H-H line shown in the simulation view of the lighting pattern).

Furthermore, the light-projecting device Q and the light cut-off structure 7 thereof can utilize the technical solutions about “the first light extinction area 76 is arranged on a first side of the lighting-pattern modifying portion” and “the second light extinction area is arranged on a second side of the lighting-pattern modifying portion” to reduce the stray light projected above the horizontal line.

the light-projecting device Q and the light cut-off structure 7 thereof can utilize the technical feature about “the top surface 73 in which a portion thereof is inclined along the inclination E” to enhance the light condensing effect.

The aforementioned descriptions merely represent the preferred embodiments of the instant disclosure, without any intention to limit the scope of the instant disclosure which is fully described only within the following claims. Various equivalent changes, alterations or modifications based on the claims of the instant disclosure are all, consequently, viewed as being embraced by the scope of the instant disclosure. 

What is claimed is:
 1. A light cut-off structure, comprising: a cut-off body; a front cut-off edge, arranged on the cut-off body; a rear cut-off edge, arranged on the cut-off body and corresponding in position to the front cut-off edge, wherein the front cut-off edge and the rear cut-off edge constitute a lighting-pattern modifying portion; a top surface, arranged on the cut-off body and connected between the front cut-off edge and the rear cut-off edge; and a light extinction area, in the vicinity of the front cut-off edge.
 2. The light cut-off structure of claim 1, wherein the light extinction area includes a first light extinction area and a second light extinction area, the first light extinction area is arranged on a first side of the lighting-pattern modifying portion, and the second light extinction area is arranged on a second side of the lighting-pattern modifying portion.
 3. The light cut-off structure of claim 2, wherein the first light extinction area and the second light extinction area are connected to each other.
 4. The light cut-off structure of claim 2, wherein the top surface has a predetermined width, the first light extinction area has a first predetermined width and the second light extinction area has a second predetermined width, the ratio of the predetermined width to the first predetermined width is in a range of 50 to 1.1, and the ratio of the predetermined width to the second predetermined width is in a range of 50 to 1.1.
 5. The light cut-off structure of claim 2, wherein the first light extinction area has a first recess, the second light extinction area has a second recess, and the first recess and the second recess are in the vicinity of the front cut-off edge.
 6. The light cut-off structure of claim 5, further comprising a front side surface connected to the front cut-off edge, wherein the first recess has a first side surface connected to the front side surface and a second side surface connected to the first side surface, and the second recess has a third side surface and a fourth side surface connected to the third side surface.
 7. The light cut-off structure of claim 6, wherein the first side surface has a first predetermined angle of between 5 and 85 degrees relative to the front side surface, and the third side surface has a second predetermined angle of between 5 and 85 degrees relative to the front side surface.
 8. The light cut-off structure of claim 6, wherein the second side surface has a third predetermined angle of between 0 and 75 degrees relative to the front side surface, and the fourth side surface has a fourth predetermined angle of between 0 and 75 degrees relative to the front side surface
 9. The light cut-off structure of claim 6, wherein the second side surface has a fifth predetermined angle of between 90 and 165 degrees relative to the top surface, and the fourth side surface has a sixth predetermined angle of between 90 and 165 degrees relative to the top surface.
 10. The light cut-off structure of claim 6, wherein a chamfer is respectively formed between the front side surface and the first side surface, between the first side surface and the second side surface, between the second side surface and the top surface, between the front side surface and the third side surface, between the third side surface and the fourth side surface, and between the fourth side surface and the top surface.
 11. The light cut-off structure of claim 2, wherein the first light extinction area has a first layered structure, the second light extinction area has a second layered structure, and the first layered structure and the second layered structure each have a light absorbance of greater than 30%.
 12. The light cut-off structure of claim 2, further comprising a plate body disposed on the cut-off body, wherein the plate body has a first extension portion extending along a first predetermined direction and a second extension portion extending along a second predetermined direction, the first light extinction area is arranged between the first extension portion and the front cut-off edge, and the second light extinction area is arranged between the second extension portion and the front cut-off edge.
 13. The light cut-off structure of claim 1, wherein a portion of the top surface is inclined along an inclination direction from the front cut-off edge toward the rear cut-off edge, the portion of the top surface has a predetermined inclination angle relative to a horizontal plane or a lens optical axis, and the predetermined inclination angle is greater than 0 degree and less than 30 degrees
 14. The light cut-off structure of claim 13, further comprising a front side surface and a rear side surface opposite to the front side surface, wherein the front cut-off edge includes a first front edge segment, a second front edge segment, and a front transitional edge segment connected or disposed between the first front edge segment and the second front edge segment, and the rear cut-off edge includes a first rear edge segment, a second rear edge segment, and a rear transitional edge segment connected or disposed between the first rear edge segment and the second rear edge segment.
 15. The light cut-off structure of claim 1, wherein the top surface has a recess structure recessed therein and disposed between the front cut-off edge and the rear cut-off edge, wherein an inclination direction is defined from the front cut-off edge toward the rear cut-off edge, and the recess structure has a transitional reflecting surface that is inclined along the inclination direction.
 16. A light-projecting device, comprising: a supporting mount; a first reflecting structure, disposed on the supporting mount; a first light-emitting structure, disposed on the supporting mount, wherein the first light-emitting structure corresponds in position to the first reflecting structure; a lens structure, corresponding in position to the first reflecting structure; and a light cut-off structure, including a cut-off body, a front cut-off edge, a rear cut-off edge, a top surface, and a light extinction area; wherein the front cut-off edge is arranged on the cut-off body; wherein the rear cut-off edge is arranged on the cut-off body and corresponds in position to the front cut-off edge, and the front cut-off edge and the rear cut-off edge constitute a lighting-pattern modifying portion; wherein the top surface is arranged on the cut-off body and connected between the front cut-off edge and the rear cut-off edge; wherein the light extinction area is in the vicinity of the front cut-off edge.
 17. The light-projecting device of claim 16, further comprising a second reflecting structure and a second light-emitting structure, wherein the second reflecting structure is disposed on the supporting mount and aligned with to the first reflecting structure, and the second light-emitting structure corresponds in position to the first reflecting structure.
 18. The light-projecting device of claim 16, wherein the light extinction area includes a first light extinction area and a second light extinction area, the first light extinction area is arranged on a first side of the lighting-pattern modifying portion, and the second light extinction area is arranged on a second side of the lighting-pattern modifying portion.
 19. The light-projecting device of claim 18, wherein the first light extinction area and the second light extinction area are connected to each other.
 20. The light-projecting device of claim 18, wherein the first light extinction area has a first recess, the second light extinction area has a second recess, and the first recess and the second recess are in the vicinity of the front cut-off edge.
 21. The light-projecting device of claim 18, wherein the first light extinction area has a first layered structure, the second light extinction area has a second layered structure, and the first layered structure and the second layered structure each have a light absorbance of greater than 30%.
 22. The light-projecting device of claim 18, further comprising a plate body disposed on the cut-off body, wherein the plate body has a first extension portion extending along a first predetermined direction and a second extension portion extending along a second predetermined direction, the first light extinction area is arranged between the first extension portion and the front cut-off edge, and the second light extinction area is arranged between the second extension portion and the front cut-off edge.
 23. The light-projecting device of claim 16, wherein the first side surface has a first predetermined angle relative to the front side surface, the third side surface has a second predetermined angle relative to the front side surface, the second side surface has a third predetermined angle relative to the front side surface, the fourth side surface has a fourth predetermined angle relative to the front side surface, the second side surface has a fifth predetermined angle relative to the top surface, the fourth side surface has a sixth predetermined angle relative to the top surface.
 24. A light cut-off structure, comprising: a cut-off body; a lighting-pattern modifying portion, disposed on the cut-off body; a first light extinction area, disposed on the cut-off body and arranged on a first side of the lighting-pattern modifying portion; and a second light extinction area, disposed on the cut-off body and arranged on a second side of the lighting-pattern modifying portion.
 25. The light cut-off structure of claim 24, wherein the first light extinction area has a first recess, the second light extinction area has a second recess, and the first recess and the second recess are in the vicinity of the front cut-off edge.
 26. The light cut-off structure of claim 24, wherein the first light extinction area has a first layered structure, the second light extinction area has a second layered structure, and the first layered structure and the second layered structure each have a light absorbance of greater than 30%. 